Tuber (4)
(Other definitions for root that I've seen before include "Turn up with the snout." , "Basic source or origin" , "burrow" , "Underground part of a plant" , "cheer" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tuber</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bulb that I've seen before include "Onion, perhaps" , "Source of flower or light" , "daffodil here" , "Corm; electric light" , "Tulip, for example" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tuber</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for potato that I've seen before include "Edible tuber; hole in stocking (colloq.)" , "It's often baked" , "Common vegetable" , "The humble spud" , "Maris Piper?" .)